Kailua, Big Island weather in May 2026

Expect daytime maximum temperatures of 70°F in Kailua, Big Island, Hawaii in May based on long-term weather averages. There are 15 days with some rainfall and typically 2.3 inches of rainfall in the month.

  • 70°F maximum daytime temperature in May in Kailua, Big Island70
    70°F max day temperature
  • 15 days with some rainfall in May in Kailua, Big Island15
    15 days with some rainfall
  • 55°F minimum night-time temperature in May in Kailua, Big Island55
    55°F min night temperature
  • 13 hours of daylight per day in May in Kailua, Big Island13
    13 hours of daylight per day
  • Low heat & humidity in May in Kailua, Big IslandL
    Low heat & humidity
  • 2.3 inches monthly rainfall in May in Kailua, Big Island2.3
    2.3 inches of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in May in Kailua, Big Island11
    11+ (Extreme) UV index
  • 77°F sea temperature in May in Kailua, Big Island77
    77°F sea temperature

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Kailua, Big Island by month

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The May weather guide for Hawaii (Kailua, Big Island) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C)  |  Imperial (°F)

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How hot is it in Kailua, Big Island in May?

Daytime temperatures usually reach 70°F in Kailua, Big Island in May, falling to 55°F at night.

How warm is the sea around Kailua, Big Island in May?

The average sea temperature around Kailua, Big Island in May is 77°F.

Does it rain in Kailua, Big Island in May?

There are usually 15 days with some rain in Kailua, Big Island in May and the average monthly rainfall is 2.3 inches.

Kailua, Big Island May sunrise & sunset times

Browse the sunrise and sunset times for Kailua, Big Island in May 2026. Select a month to view Kailua, Big Island sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st May 2026 05:55 18:47
Saturday, 16th May 2026 05:48 18:53
Sunday, 31st May 2026 05:45 18:59

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